feat(backend,shared): Move buildAccountsBaseUrl to shared utility (#5416)

Author: dstaley

.changeset/clever-walls-shave.md

@@ -0,0 +1,5 @@
+---
+'@clerk/backend': patch
+---
+
+Update `@clerk/shared` dependency to use new shared `buildAccountsBaseUrl` utility.

.changeset/spicy-radios-happen.md

@@ -0,0 +1,5 @@
+---
+'@clerk/shared': minor
+---
+
+Add shared `buildAccountsBaseUrl` utility.

packages/backend/src/createRedirect.ts

@@ -1,3 +1,5 @@
+import { buildAccountsBaseUrl } from '@clerk/shared/buildAccountsBaseUrl';
+
 import { constants } from './constants';
 import { errorThrower, parsePublishableKey } from './util/shared';
 
@@ -54,19 +56,6 @@ const legacyBuildUrl = (targetUrl: string, redirectUrl?: string) => {
   return url.toString();
 };
 
-const buildAccountsBaseUrl = (frontendApi?: string) => {
-  if (!frontendApi) {
-    return '';
-  }
-
-  // convert url from FAPI to accounts for Kima and legacy (prod & dev) instances
-  const accountsBaseUrl = frontendApi
-    // staging accounts
-    .replace(/clerk\.accountsstage\./, 'accountsstage.')
-    .replace(/clerk\.accounts\.|clerk\./, 'accounts.');
-  return `https://${accountsBaseUrl}`;
-};
-
 type RedirectAdapter<RedirectReturn> = (url: string) => RedirectReturn;
 type RedirectToParams = { returnBackUrl?: string | URL | null };
 export type RedirectFun<ReturnType> = (params?: RedirectToParams) => ReturnType;

packages/shared/src/__tests__/buildAccountsBaseUrl.test.ts

@@ -0,0 +1,12 @@
+import { buildAccountsBaseUrl } from '../buildAccountsBaseUrl';
+
+test.each([
+  ['', ''],
+  [undefined, ''],
+  ['one-two-three.clerk.accountsstage.dev', 'https://one-two-three.accountsstage.dev'],
+  ['one-two-three.clerk.accounts.dev', 'https://one-two-three.accounts.dev'],
+  ['clerk.accounts.example.com', 'https://accounts.example.com'],
+  ['clerk.example.com', 'https://accounts.example.com'],
+])('buildAccountsBaseUrl(%s)', (frontendApi, accountsBaseUrl) => {
+  expect(buildAccountsBaseUrl(frontendApi)).toBe(accountsBaseUrl);
+});

packages/shared/src/buildAccountsBaseUrl.ts

@@ -0,0 +1,15 @@
+/**
+ * Builds a full origin string pointing to the Account Portal for the given frontend API.
+ */
+export function buildAccountsBaseUrl(frontendApi?: string): string {
+  if (!frontendApi) {
+    return '';
+  }
+
+  // convert url from FAPI to accounts for Kima and legacy (prod & dev) instances
+  const accountsBaseUrl = frontendApi
+    // staging accounts
+    .replace(/clerk\.accountsstage\./, 'accountsstage.')
+    .replace(/clerk\.accounts\.|clerk\./, 'accounts.');
+  return `https://${accountsBaseUrl}`;
+}